Freiburg 2024 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 3: Bosonic Quantum Gases I (joint session Q/A)

A 3.1: Vortrag

Montag, 11. März 2024, 11:00–11:15, Aula

Universal Dynamics of Rogue Waves in a Quenched Spinor Bose Condensate — •Ido Siovitz, Stefan Lannig, Yannick Deller, Helmut Strobel, Markus K. Oberthaler, and Thomas Gasenzer — Kirchhoff-Institut für Physik, Universität Heidelberg

Universal scaling dynamics of isolated many-body systems far from equilibrium is a phenomenon documented both in theory and experiment, the mechanisms of which are not yet fully understood. We connect the universal dynamics of a spin-1 gas with rogue-wave like events in the mutually coupled magnetic components of the gas, which propagate in an effectively random potential governed by the nonlinear spin-changing interaction. As a result, real-time instantons appear in the Larmor phase of the spin-1 system as vortices in space and time. We investigate the spatial and temporal correlations of these events to find two mutually related scaling exponents defining the coarsening evolution of length and time scales, respectively.

Keywords: Spinor condensates; Rogue waves; Caustics; Far from equilibrium; Universal scaling